A Minimally-biased Philosophy of Life: Speculations

What is the highest frequency at which human vibrational communication might operate. For example, one can imagine elasatic surface-waves (akin to capillary waves on water) traversing the skin of a human as part of an active network implementing the sense of touch. Such wave might be imaged by the same laser-holograph technology which images the surfaces of vibrating violins. Does human skin in fact exhibit vibratory patterns? At what spatio-temporal frequencies, with what information content?